Has anyone ever done this?? I'm looking into it how strong is the front crank snout would the single drive key in the crank sprocket be strong enough? There is plenty of room once the power steering pump is removed. Any thoughts or help is greatly appreciated thanks.

The keyway is more of an alignment tool then anything else, engine is kept in time from friction placed between the cog sprocket and crank snout via the balancer and crank bolt. The four Allen head bolts only bolt the balancer and cog sprocket together.
That keyway alone won't keep the engine in time as a member here has found that out the hard way.
You will need to find another method of transferring the power from the crank snout to the four bolts on the balancer.
Adding a larger keyway maybe?
The dirty route of cold welding the cog sprocket on?

Its real hard to get a picture in its native environment inside the fan shroud.
I have a video, but the engine is running, so tough to see anything.

there are IIRC 4 bolts inside the bonded rubber ring for the unclutched fan,and 4 machined nubs inboard of them provide accurate centering.
It is a pretty long lever, so side loading might be an issue.
Generator/marine engines probably use the same part.